Fireplace heater



Feb. 15, 1955 0, B, LElBs-r 2,702,030

FIREPLACE HEATER Filed July l, 1 952 v 2 Sheets-Sheet 2 IN VEN TOR.

United States Pefflfj@ A.

FIREPLACE HEATER Oscar B. Leibst, Seattle, Wash.

Application July 1, 1952, Serial No. 296,538

1 Claim. (Cl. 126-121) This invention relates to fireplace heaters, andparticularly to adjustable furnaces for disposition in varying sizedfireplaces.

In the practice of heating rooms by fireplaces, it is important toprovide adjustable furnaces for disposition therein which may be easilyconnected and permit expansion thereof by heat without damage to thefireplace or the furnaces. It is also important to provide a grate inthe furnace for burning various kinds of fuel and formed of tubular barsfor passage of air therethrough, such air to be heated by the barsduring the passage, and to be thereafter returned into the room forheating the same with means for preventing smoke from entering the room.

It is therefore one of the objects of this invention to provide a gratefor supporting burning fuel and formed of a plurality of tubular barshaving their front ends opening from the room in front of the fireplaceand having their rear ends opening into a heating chamber disposed inthe back of the fireplace. Together with the flue extended from the topof the chamber upwardly and outwardly and braced against the top arch ofthe fireplace, with the springs for supporting the front ends of thebars resiliently to permit expansion when heated below the arch.

A further object is to provide a duct with one end thereof opening intothe room and the rear end extended into the heating chamber and upwardtherein to a point above the level of the grate bars, the said ducthaving a fan at the outer end for driving air through the duct and intothe chamber for drawing air through the bars for heating the same, andalso for discharging heated air from the chamber into the room.

A still further object is to provide an upstanding guard or fender alongthe top of the outer ends of the bars for retaining the fuel and havinga sloping outer face plate for diverting drafts of air from the roomupward into the chimney for providing a screen in front of any smoke toprevent the same from entering the room and for carrying the smokeupward through the chimney.

With these and other objects to be hereinafter stated I have exemplifiedmy invention by the accompanying drawings of which: Figure l shows afront elevation of the furnace assembly. Figure 2 indicates a top planof the lower portion thereof taken on line 2-2 of Fig. 1. Figure 3 is anend view taken from the right hand direction znd Figure 4 is a sectionview taken on line 4-4 of Fig.

Like numerals on the different figures represent like parts. Numeralindicates a series of tubular bars having their front ends 10 openingfrom the room and their rear ends 10 opening into and connected with aheating chamber 13 in the rear of a fireplace. A bar 11 across the frontends of the bars connect the same with spaces between the same for airpassage for burning the fuel. The assembled bars forming the grate 12for a fireplace. The chamber 13 is formed by rectangular casing to bedisposed in the back of the fireplace for receiving the air in heatedcondition after passing through the bars. The front wall 13' of thechamber also provides a wall or guard to retain fuel on the grate and isheated by the tire in front which increases the heat in the air from thebars.

Centrally from the chamber is an upraised fiue 14 carried upwardly andforwardly to the top of the fireplace and outwardly along and againstthe arch 15 of the lireplace and is preferably provided with a box 15around ,i 2,702,030 YPatented Feb 1.5,VV

I the mouth 16 of theue for discharging the heated air lar incrosssection, but rounded along the top 14? to prevent obstructingupward owofsmoke into .a chimney 17 Helical springs 18 are mountedbeneath the outer ends of the grate bars for resiliently binding the topof the flue against the arch of the fireplace to prevent any smokepassing outward above the flue into the room and particularly to permitthe bars and assembly to expand downward from the arch when heatedwithout injury to the assembly, and also to maintain the bars in spacedrelation above the fioor and the fireplace for entry of air drafts forthe fires and to provide space for any ash tray 19. Tubular guides 18'and 18 are telescopically mounted around the springs to retain the samein vertical positions and to permit the springs to expand and contracttherein.

A rectangular baffle or fender 20 is connected across the outer ends ofthe bars to prevent the fuel and fire from entering the room, andparticularly for supporting a face plate 21. This plate is maintained inspaced relation in front of the fender and obliquely therewith slopingupwardly and inwardly for diverting drafts of air upwardly and inwardlyacross the front of the fire-place for a screen in front of any smokebehind the same and to prevent the smoke from entering the room and todirect the same upward through the chimney.

It will be understood that air when heated by passing through the barsby suction from heated air in the chamber flowing upward in the fluewill mingle and rise from the top of the fiue and mouth 16 thereof intothe room to some extent, but in order to increase the flow of suchheated air in the room a duct 22 is mounted along one end of the grateand extended laterally into the base of the heating chamber 13, andupwardly therein as 22. Any ordinary fan indicated as 23" is preferablymounted for operation at the outer end of the duct for driving airthrough the same. The fan may be located in a casing 23 on a shaft 23from a motor indicated by 24, whereby any desired current of air may beforced into and upward through the fiue, and outward from the mouth 16into the room in heated condition, by the bars and from the front wallof the chamber.

For accelerating the suction by the air from the duct for drawing in airthrough the bars and the heated air from the chamber the top of the ductis carried to a point above the level of the grate bars to preventoutflow through the bars, and there provided with a relatively narrowrectangular mouth 25 near the front wall of the fiue for passage of aircurrents from the fan. A relatively short distance below the mouth 25 agash is disposed across the inner wall of the duct providing a lip 27which is extended outward to provide a venturi like neck 28 along thewall 26 of the duct. In operation when the air current is forced fromthe mouth of the iiue it siphons or draws the heated air from thechamber and lower portion of the flue through the neck 28 and carriesthe same upward through the fiue into the room at the desired speed andtemperature.

Having described my invention I claim as new for Letters Patent:

A heating unit for a room, comprising a fireplace, an arch across thetop thereof, a plurality of bars connected in parallel relation formingthe grate for the replace, said bars having their outer ends open fordrawing air from a room and their rear ends opening into a heatingchamber in the back of said fireplace, a chimney above the fireplace, aheating chamber first mentioned having a flue extended upward therefromand outward in the fireplace and adapted to open into the room, a ducthaving one end thereof adapted to open into the room and extendingrearwardly into the heating chamber and upwardly therein to a positionhigher than the rear ends of the bars for discharging currents of airupwardly into the flue, springs disposed beneath the outer ends of thebars for resiliently binding the upper end of the flue against the archof the fireplace to prevent smoke from passing outward from above theflue and to permit the flue and grate bars to expand downwardly whenheated Without injury thereto and to facilitate the use of the`iitlinleplaes ofy'ayiig'elvations vertically, a fender References Citedin the le of this patent attached to 4and -upstanding `from `the -front-of -the -bars for supporting a face plate, a face plate rst mentionedUNITED STATES PATENTS diagonally disposed in front of the fenderdisposed in- 292,937 Morgan Feb. 5, 1884 waidly and upwardly fordiverting l,di'afts of air 'from lthe 5 529,972 Tatem Nov. 27, 1894i'opmfinwardly and `upwardly lin th Vfireplace and for 1,588,587 KlausJune 15, 1926 A :providing a shi'eld in front of any smokeand forciarrying 2,161,723 Rutland June 6, 1939 th-'same upward from saidchimny and 4toiprevent's'moke from `A-entering the -rom.

